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HVAC homeowner guide

Furnace Replacement Quote Review

Understand what a complete furnace replacement estimate should include, identify pricing red flags, and know the right questions to ask before approving the job.

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Furnace replacement is one of the most expensive HVAC decisions a homeowner faces, with quotes ranging from $2,500 to over $10,000 depending on equipment tier, labor market, and scope. A legitimate estimate should break down the furnace unit, labor, venting modifications, thermostat, permits, and any associated ductwork adjustments separately. Many homeowners approve furnace quotes without knowing whether they are paying retail price for the equipment or two to three times that. ZunoQuote benchmarks every line item in your furnace replacement estimate against regional data so you can negotiate from a position of knowledge.

01Review standard

What a complete furnace replacement estimate should include

  • ✓Furnace brand, model number, and AFUE efficiency rating
  • ✓Labor hours and rate listed separately from equipment cost
  • ✓Venting and flue pipe modifications itemized
  • ✓Thermostat installation or replacement noted
  • ✓Gas line inspection or modification if required
  • ✓Permit and inspection fees clearly stated - not bundled
  • ✓Disposal or haul-away of old furnace noted
  • ✓Warranty terms for both equipment and labor stated explicitly
  • ✓Filter and media cabinet installation if included
02Watch closely

Furnace quote red flags to watch for

  • !Furnace model number omitted or listed only as "comparable unit"
  • !Equipment price far above or below the retail price for the stated model
  • !Permit fees not mentioned - often added as a surprise later
  • !Venting work not itemized even though furnace is being upsized or changed
  • !Labor rate not broken out from equipment cost
  • !Same-day or high-pressure urgency to sign without time to review
  • !Efficiency rating not stated - makes it impossible to compare bids
  • !Warranty limited to only parts with no labor warranty offered
03Questions to use

Questions to ask before approving a furnace replacement quote

  • ?"What is the model number of the furnace you are installing?"
  • ?"What AFUE efficiency rating does this unit have and why did you recommend it?"
  • ?"Is the permit fee included in this quote and will you pull it?"
  • ?"What venting or flue modifications are required and are they included here?"
  • ?"Can you break out labor and equipment as separate line items?"
  • ?"What warranty covers this installation for both parts and labor?"
  • ?"Will the old furnace be removed and is that included in the price?"
04Review standard

How ZunoQuote reviews your furnace replacement estimate

  • ✓Extracts every line item from your PDF, photo, or screenshot
  • ✓Benchmarks equipment pricing against regional data for your ZIP code
  • ✓Flags labor rates above or below the regional norm for furnace replacement
  • ✓Detects missing scope: permits, venting, warranty terms, disposal
  • ✓Verifies efficiency rating and flags if not stated
  • ✓Returns a report with a verdict per line item and suggested questions

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Clear answers

Frequently asked questions

What is a fair price for furnace replacement?+

Furnace replacement typically costs $2,500 to $7,500 for standard efficiency models (80 AFUE) and $4,000 to $10,000 for high-efficiency models (96+ AFUE). Labor usually ranges from $500 to $1,500 depending on complexity. Prices vary by region, brand, and whether venting modifications are needed. ZunoQuote benchmarks your specific quote against regional data for your ZIP code.

Should the furnace model number be on the quote?+

Yes. The model number lets you verify the retail price of the equipment and compare it to what the contractor is charging. A quote that lists only "gas furnace" or "comparable unit" without a model number cannot be properly evaluated and should be questioned.

Is a permit required for furnace replacement?+

In most US jurisdictions, furnace replacement requires a permit and a final inspection by a local inspector. If the contractor does not mention a permit, ask explicitly. Unpermitted work can cause problems with homeowners insurance and when you sell your home.

What AFUE rating should I choose?+

80 AFUE is the minimum for new furnaces and is typically adequate in mild climates. 95-96+ AFUE high-efficiency furnaces cost more upfront but reduce gas bills significantly in cold climates. A legitimate contractor should explain the efficiency options and help you choose based on your heating costs and climate.

Can ZunoQuote review a furnace quote that came by email?+

Yes. Take a screenshot of the emailed quote and upload it. ZunoQuote accepts PDF, JPG, PNG, and HEIC files, as well as screenshots. The AI reads the text from the image to extract line items.

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